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Electric motor construction

  • US 3,898,488 A
  • Filed: 02/04/1974
  • Issued: 08/05/1975
  • Est. Priority Date: 02/28/1972
  • Status: Expired due to Term
First Claim
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1. An electric motor construction comprising:

  • a. a substantially rectangular mounting plate, b. a U-shaped outer field plate having a substantially flat bottom portion and upstanding legs extending therefrom, said Ushaped outer field plate disposed over said mounting plate to provide an enclosure linearly extending to an area near the center of said mounting plate, an aperture disposed in said flat-bottom portion, and poles provided in said U-shaped outer field plate extending into said aperture, c. an energizing winding carried by said mounting plate within said enclosure, d. an inner field plate disposed above said energizing winding having poles intermeshing said poles of said U-shaped outer field plate, e. a permanent magnet rotor disposed above said energizing winding and rotatable within said intermeshed poles and having a plurality of magnetic poles along its periphery, f. at least one shaft extending from said mounting plate juxtaposition said enclosure, g. a speed reduction means including at least one gear rotatably journalled on said shaft, h. an arm extending from said inner field plate and a notch in a distal end of said arm at least partially surrounding said shaft so as to provide a means for locating the center distance between said gear and said rotor, and i. means operably connecting said rotor with said speed reduction gear.

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